Destructor-furnace.



P. 1 CANHAM. DESTRUGTOR FURNACE.

APPLICATION FILED OO'LE, 1910.

Patented July 1, 1913.

WITNESSES." uvvmnm I D. C'am mm T0 POWER SPECIALTY COMPANY,

01 NEW 350E111, N. 511, A CORPORATION OF NEW YORK.

DES'I RUCTOR-FURNACE.

ocales,

s ecification of Letters Patent.

Patented July 1, 1913.,

Application filed October 5, 1910. Serial No. 585,386.

To all whom it may concern Be it known that l, llnucv .D. CANHAM, a subject of the f ling of Great Britain, residing at New York, county of Richmond, and State of New York, have invented certain new and useful improvements in Destructor-Furnaces, of which the following is a full, clear, and exact description.

In the operation of socalled destructor furnaces the material consumed is, in general, refuse, such as household and city waste, wet and dry, inflammable and non-inflammable, and is or low calorific value. This makes it specially important that the furnace operate with the highest cihciency, making the greatest possible amount of the heat available for useful purposes, with the least possible loss. To this end it is desirable that the heatremaining in the clinker, after the combustible ma; terial has been consumed, be utilized. The usual way of utilizing such heat is to employ it for heating the air which supports the combustion, and it is to this met 0d of utilization that my present invention generally relates, its chief object being to provide improved means for handling the clinker in a convenient and expeditious man ner, and for disposing of it in such way as to cause its heat to be rapidly and eiliciently imparted to the air furnished to the burning mass on the combustion grate or in the grate chamber.

To this and other ends the invention con; sists in the novel fcaturesof construction and combinations of elements hereinafter described, and more particularly set forth in the claims;

A convenient and ellcctive'embodiment of the invention is illustrated in the accompanying drawings, in which-- Figure l is ,a sectional plan view, on line l-1 of Fig. 2, of a destructor furnace in which my invention is employed. Fig. 2 is a sectional side view. r

The furnace illustrated comprises a series of grate chambers, one being shown at 12, arranged side by side and each communicating with the adjoining chambers through suitable openings, one of which is shown at 13, so that the products'of combustion can flow from one chamber to the next, in succession, finally reaching the stack or outlet flue, not shown. The bottom of each grate chamber is formed by a grate on which the burning of the refuse takes place, each combustion grate being preferably of the type described in the application of E. H. Foster, Serial No. 539,103, filed January 20, 1910, and J. T. Fetherston, Serial No. 541,504, filed February 2, 1910. In grates of this type, as illustrated, the grate, at 14, is slidably mounted on anti-friction rollers 15, journaled in rails, as 16, at the sides of the clinker-pit 17 near the top thereof. Connected to the movable grate is the plunger 18 of a suitable fluid-pressure ram 19, by which the grate may be actuated. In the present form the ram is in front of the furnace, and the lower front wall 20 of the grate chamber is substantially vertical, so that as the grate is retracted or drawn out from under the grate chamber such vertical wall will scrape the clinker oil and ,into the clinkenpit below. An air-tight chamber 39- is employed to receive the grate when the latter is retracted from under the grate chamber.

The mouth 21 of the grate chamber is provided with a vertically movable door 22,

for example that shown connected With suitable counter-weights, not

shown, and in front of the chamber mouth is a charging apparatus of the type described in the application of J. T. Fetherston, Serial No. 541,503, filed February 2, 1910, comprising a pan or receptacle 23, movable into and out of the furuace,'on suitable supporting rollers and rails, by means of a fluid pressure ram the plunger of which is shown at 24.

To charge the furnace the pan is filled with the materlal to be burned and is advanced into the grate chamber. The pan is then retracted, but the wall 25 thereof is held stationary during part, at least, of such movement, thereby causing the material in the pan to be dislodged over the opposite edge, on tothe combustion grate. The bottom of the clinker pit is formed by a grate 26 upon which the clinker falls as it is dislodged from the moving combus tion grate 14. Below the clinker grate is an air chamber 27, connected at its rear, by means of a passage 28, with an air-duct 29 through which a current of air is caused to flow by any suitable means not shown. In the passage 28 is a damper or valve 30 by which the flow of air to the air chamber may beregulated. The. clinker grate being covered with lumps 'or pieces of clinker of various sizes, it will be seen that the air, flow ing up through the grate openings and the clinker, will be highly heated before reaching the combustion grate; the result being that the combustion on the latter grate is more rapid and thorough than would be the case if the air were supplied cold or only moderately heated.

Atone end of the clinker-pit, for example the rear, is a fluid pressure ram 31, the plunger 32 of which is connected to a scraper 33 movable over the clinker grate. As the plunger is advanced the scraper pushes the clinker otf the'gra-te through the front opening of the pit and over a shelf or lip 34; into a car 35 by which the clinker is carried to the dump. .The front opening, or mouth, of the clinker-pit is provided with a suitable door 36, in the present instance hinged at one side, by which the clinker pit mouth is closed except while the car is being loaded. The air chamber below the clinker grate may be provided with a clean-out opening 37, normally covered by a removable closure 38.

The apparatus described is, as will be recognized, an eflicient meansfor; handling and disposing of the clinker for the purpose before mentioned, the clinker being deposited on the clinker grate expeditiously and with practically no loss of heat. After the heat of the cl-inkeir has been imparted to the air-*fiowing through the clinker is rapidly delivered to the car, leaving the clinker grate clear and ready for another load from the combustion grate,

The embodiment described is, as just stated, etiicient, and is also simple in construction and convenient in operation, but it is to be understood that the invention may be embodied in other forms without departure from its proper spirit and scope as defined by the appended claims.

I claim 1. In a destructor furnace, a grate charm. ber, a horizontally reciprocating grate therein adapted to support all refuse which is substantially consumed thereon, an air-tight chamber located outside of the grate chamher and adapted to receive the grate when the latter is retracted from under the grate chamber, a clinker pit below said grate chamber, said reciprocating grate discharging hot clinker into said clinker pit, a clinker grate in said clinker pit, an air chamber below said clinker grate, means for supplying air to said air chamber, said air passing through the clinker grate and the clinker and becoming highly heated thereby, and a power actuated means for discharging cooled clinker from the clinker grate.

2. Ina destructor furnace, a grate chamber, horizontally reciprocating grate therein adapted'to support all refuse which is substantially consumed thereon, an air-tight chamber located outside of the grate chamher and adapted. to receive the grate when the latter is retracted from under the grate chamber, a clinker pit below said grate chamber, a clinker grate in said clinker pit,

means for reciprocating the first mentioned grate horizontally into the air-tight chamber to distribute hot'clinker from the grate chamber upon said clinker grate, means located between the furnace grate and the clinker grate to discharge the clinker from the latter, means passing through the walls between the grates to operate the aforesaid means the walls between said grates having an opening through which the clinker is discharged from the-pit by the aforesaid means, an air chamber below said clinker grate, and means for supplying air under pressure to said air chamber, whereby said air passes through the clinker grate and the hot clinker thereon and becomes highly heated thereby.

3. In a destructor furnace, in combination, a grate chamber in which the combustion takes place, a horizontally reciprocating grate in said grate chamber, a clinker pit in substantially vertical alinement with and below the grate chamber, an air-tight chamber located outside of the grate chamber and adapted to receive the grate when the latter is retracted from under the grate chamber, means for retracting the grate from the grate chamber into said air-tight chamber to discharge hot clinker from the grate chamber into the clinker pit, the walls of said clinker pit provided with a lateral open ing through which the clinker is discharged from the clinker pit, a scraper arrange above the clinker grate and movable thereover in line with the discharge opening of the clinker pit, a power actuated means passing through the walls of the clinker pit for advancing the scraper whereby the cooled clinker is scraped OK the clinker grate and through said opening out of the clinker pit, an air chamber belowthe clinker pit and in substantially vertical alinement with the grate chamberand clinker pit, and means for supplying air to the air chamber, said air passing through the clinker grate and the clinker and becoming highly heated thereby.

In testimony whereof I afiix my signature in the presence of two subscribing witnesses.

PERCY D. CANHAM.

Witnesses:

M. Lawson Dyan, BERT. R. SANDMANL 

